Believe me, I see your problem and I understand your point and I consider that you are right. You are not the only one who believes that the tag system can be improved.
My point doesn't deny that, but that it's impossible to keep everyone happy with a limited amount of resources, for example, if you block adult content, a lot of people who are adults and don't mind playing those games, maybe they never even know they exist, because you need to enable an option you never knew existed.
That leads to people who make adult content receiving far fewer views.
For some people that is good, for others it is not. I believe that the current system, as a balance to this problem, works well, it could be improved, for sure, but perhaps that means investing many more resources. That's why even if I understand your problem, I can't give you 100% reason, which also doesn't mean that I don't consider your arguments reasonable.